Improvement in ventilators and chimney-caps



& 2 Sheets- Sheet 1.. C. A. VAILE. Ventilator and (lhimney Oap.

No. 196,504. Patented Oct. 23, 1877.

B jlVen or MPEYERS. PHOlV-LiTHOGRAPHER. WASHXNGTON. U. C:

. To all whom "it may concern:

U ITE STATES CHARLES A. VAILE,

PATE'I Eric;

OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO MAROUS'RIGE, OF SAME PLACE.

IMPROVEMENT IN VENTILATORS AND CHIMNEY-CAPS.

Specification forming part of Letters Patent No. 196,504, dated October 23, 1877; application filed April 16, 1877.

Be it known that I, CHARLES A. VAILE, of

,the city and county of WVorcestenand State of Massachusetts, have invented certain new and useful Improvements in Ventilators and Ghimneyfiaps; and I declare the following to be a description of my said invention sufliciently full, clear, and exact to enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanyingdrawings, which form a part of this specification, and in which Figure 1 represents a side view of a cap made in accordance with my invention, and adapted for a cylindrical flue. Fi 2 is a vertical central section of the same; Fig. 3, a horizontal section at line ac m, Fig. 1; Fig. 4, a half-elevation half-section view of a rectangular double cap embracing my invention, as adapted for square and double-flued chimneys. Fig. 5 is a half-plan half horizontal sectional view of the same, and Fig. 6 represents a perspective view of a chimney with my improved cap arranged thereon.

This invention relates to that class of ventilators or chimney-caps wherein upward draft in the flue is effected or augmented by the action of the wind against or through the cap; and my invention consists in the peculiar construction and arrangement of the inlet and draft passages, and the plates, flanges, and partitions for guiding and governing the aircurrents, as hereinafter fully described.

In the drawings, A denotes the main flue, formed by the inclosing tube or casing A. '13 indicates a downwardlyinclined rim, plate or surface surrounding the tube 'A, and joining it (preferably at an angle of about forty-five degrees) near its upper extremity, the tube A projecting a short distance above the inclined surface to form the annular deflecting-flange I).

0 indicates a second rim or plate, arranged above the rim B, and having a central opening, a, concentric with and of similar shape to the end of the tube A, but of somewhat greater diameter. This opening a is surrounded by a flange, 0, of the same, or nearly the same, height as the flange b, while the position of the rim 0 is such as to give an open space or passages, c, at the top of the flange I), and below the flange c, said space 0 being about equal in width to the height of flange Z).

Within the flue-passage A, and concentric with its casing A, I arrange a short tube or casing, D, the length of which equals about one-halfthe diameter. of flue A, more or less, while the diameter of said tube D is such as to allow, space or draft-passages d at all sides between it and the casing A, said space being of about the same width or capacity as the inlet-openings c. arrangement of the passages e and d is such that the air entering the open spaces 0 passes across the end of the passages 66 and produces an upward current therein.

Upright partitions E are arranged between the rims B and O, dividing the space between said rims into separate inlet-passages, and radial partitions F are arranged across the space d, at intervals corresponding with the partitions E, to separate said space into draftpassages to match the several inlet-passages c. A greater or less number of divisions may be employed.

The top plate G for covering the end of flue or opening a is of less diameter than rims U and B, so.that downward currents of air will be deflected outward by the said rims, instead of cinling under the edge of the cap-plate. The plate G is supported by suitable standards at a height above the flange c sufficient to give the necessary exit-opening for the escape of the air or gases which pass up through the space a.

In the double .cap, where two or more flues are employed, the flues are separated by a dividing -partition, I, having a pyramidal or wedge-shaped top, 2', which deflects the aircurrents upward when blown across one flue from the other. (See Figs. 4 and 5.)

The upward draft in the flue Ais occasioned by the force of the wind passing in at the inlets e, across the ends of the d aft-passages d, and upward through the opening a, tendin g to form a partial vacuum within and below the passages d and at the center of the space a.

The cap, constructed as shown in Figs. 4, 5, and 6, is specially adapted for use on chimney-heads built of brickwork or masonry, and the inlets e are made to correspond with the (Sec Figs. 2, 3, 4, and 5.) 'The' Y and desire to secure by Letters Patent, is-

straight outer sides of the fines, the inner or draft passages 01 being straight, with their par- 7 titions F radiating from the several angles thereof. i The rimzB extends over and forms a protecting Watershed for'the masonry. iaid rim B may, if desired, be made Wider than the rim G when a thick oonrsezof masonry is to be covered. V

The cap maybe extended to include any desired number of-flnes, the upright partitions V E being arranged at intervals corresponding With the flue-divisions.

NV'hat I claim as new and ofmy invention,

The combination, in a ventilator or chimney eap, of the central passage A, the surrounding draft passage or passages 01-, opening 7 j i into and formin g" a portion of the upward flue,

the inlet space or passages 6, air deflecting rims B and (l, the latter provided with coir centric opening a, and the top plate G, and con-:-

centric opening a, substantially asset forth,

and forthe purposes stated.

2. In combination with: the flue, tubeor'tubes A,:theino1ined rim B, the upper rim '0, hav-V r in g less inclination, the 'topplate G, and the 1 inner tube 1), substantially as and forthe pur-i poses set forth. 7

3. The combination, substantially as de' scribed, in a ventilator'or ehimney cap, oi the 1 tube or fluecasing' A, inclined rim B, joining tubeAr with a flange, b, the inner concentric itubel), the upper rimO, having flangec and opening a of greater diameter than the fine A, 4

and the topplate G, made smaller or of less diameter thanthe rims 130, as and for the 5. In a ventilator or chimney-cap for two or more three, the combination, with the casing A and :rim plates B0, of the dividing-pant tion I, having inclined or pyramidal top i, substantial-ly as and for the pnrposesset forth.

6. The combination, with a chimney-head built with brick-Work or masonry,.0f a metal cap or cowl provided with a series of side inlets, e, corresponding with external sides of flues, internal lining-tubes 1), arranged concentrically within the fines to form'draft-pas sages up to the said inlets ghee-dividing pan titions having pyramidal or Wedge-shaped tops i, and: downwardlydnclined projecting rim or rims B, for covering and protecting the masonry,substantially'as herein set forth r r I "GHARLESAVVAILET Witnesses: 1

,GHAS.'H-'BURLEIGH, J; Mnncos Bros, 

